Up untill now when I have played DemiGod, I am ususally zoomed in pretty close, I sometimes Zoom out a little, just to get a better overview of the nearby action... and yes, it is quite simple to just zoom out a little more, to get that extra camera angle on the whole action.
However, in a game yesterday, I realised that I not only use the minimap for cameramovement, but for troop movement aswell, or at least I tried to use it that way (as you would in DotA/WC3) since it doesn't work that way as Blitz64 explained..
I understand that the size of the maps, somehow is an argument against a clickable minimap, but since I am usually zoomed in quite close, I find it annoying, that I have to zoom out first, and then move the mouse where I want to go, and then issue the move order, instead of just clicking the quickly accesible minimap, which is right there displaying the entire map anyway..
So basically I still withhold my suggestion of minimap camera movement, but with the addition of allowing moveorders aswell..